SU1717823A1 - Method of ore mining under complicated mining and geological conditions - Google Patents

Abstract

This invention relates to the development of ores with unstable and watered roofing and soil rocks. The purpose of the invention is to reduce the cost of production by reducing the volume of preparatory-rifled workings and the volume of backfill mixture in the development of phosphate ore deposits with a false roof in conditions of unstable and flooded roof rocks and soil. The passage of transport, drilling and stowing generation in the excavation area. An artificial roof is formed by advancing the development of a false roof with short paired lavas and laying a formed developed space with a hardening mixture with high strength and waterproof properties. When an artificial roof is formed, borer-blocking drifts are formed in the backfill array at a distance equal to two spans of the cleaning chambers. Mineral extraction is carried out by cleaning chambers of the same length as the first and second stages under the protection of the artificial roof. Chambers of the first stage are repulsed coaxially with borehole gateways in the direction from the center to the flanks of the excavation site, and chambers of the second stage - from the flanks to the center of the excavation site. The developed space of the chambers is laid with hardening mixtures. In the chambers of the second stage, prior to their laying on the soil, they form a waterproof layer of false roof rocks. 2 Il. (Ls

Description

The invention relates to the mining industry and can be used in the underground mining of phosphate ores and other gently dipping mineral deposits in unstable and watered host rocks.

The aim of the invention is to reduce the cost of production by reducing the volume of preparatory-rifled workings and the volume of backfill mixture in the development of deposits of ores with a complex roof under conditions

unstable and flooded roofs and soil rocks.

This goal is achieved by the fact that in the method of developing ores in complex mining and geological conditions, including the advanced formation of an artificial roof by setting hardening mixtures of the open space, carrying out transport, drilling and backfilling workings in the excavation site, excavation of minerals under the protection of an artificial roof with cleaning chambers

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the same width of the first and second stages and the laying of the developed space of the first-stage chambers with hardening mixtures, the artificial roof is formed by working out the false roof with short paired lavas and laying the developed space with a hardening mixture with high strength and waterproof properties, when forming the artificial roof, they form bourse folding in the filling array drifts at a distance from each other equal to two spans of cleaning chambers, chambers of the first stage work coaxially burozakladochnymi drifts in the direction from the center to the flanks of the excavation area, and the chambers of the second stage - of the flanks to the center portion, the tab to vyrabo-. the secret space of the chamber of the second stage of the breed on the soil form a waterproof layer of the rocks of the false roof.

Fig. 1 shows a diagram of the mining of the excavation site, ensuring the implementation of the method; figure 2 is a section aa in figure 1, where PI is a mineral; PC - primary camera; VC - secondary chamber, Vpb and - half block width and block length of the excavation section; I is the distance between borehole gateways; Bk is the width of the cleaning chambers; NOPL - the direction of mining.

The method is carried out as follows.

The landfill site is prepared for mining operations by a system of panel 1, block transport 2 and intermediate 3 drifts. The system of panel and block 4 drifts is also carried out in the thickness of the false roof and is connected to the workings of the industrial zone with the help of transport slopes and human rising trails.

The method of developing a gently dipping seam of a mineral includes a preliminary and advanced solid excavation of a false roof by paired short lavas 5 with laying a developed space, during which they form an artificial roof with drill-laying drifts 6. At the same time, the developed space is filled with a hardening foundation of high strength and water resistance. an artificial roof and a set of standard strength across the reservoir are cut into an intermediate drift 3 by an amount, and then the cleaning is screwed s work protected artificial roof chambers of the first and second bursts of equal width with the general direction of mining the cleaning unit from the center panel to drifts

1. The primary chambers are placed under the fascia-laying drifts 6 coaxially, which also serve as ventilation chambers. The distance between the axial lines of the burrowing drifts corresponds to two spans of the cleaning chambers, i.e. I 2k.

The primary chambers are worked in the direction from the intermediate drift 3 to the block transport drifts 2 by means of drilling and drilling while drilling the downhole fan from the luffing drift (figure 2). After working out the primary chambers, they are immediately laid out with a hardening mixture from the horizon of the false roof. After the solidification of the artificial pillars and a set of standard strength in the direction from the flanks of the block to the intermediate drift 3, the secondary chambers start working out. After working out the secondary chambers on the soil, a waterproof layer of clay-sandstone rocks of the false roof is formed, and then the chambers are filled with excess rocks obtained as a result of removing the false roof.

Claims (1)

The invention of the Method of developing ores in complex mining and geological conditions, including the advanced formation of an artificial roof by laying with hardening mixtures of the developed space, carrying out transport, drilling and filling workings in the excavation section, excavation of minerals under the protection artificial roofs with cleaning chambers of the same width of the first and second stages and laying the worked-out space of the first-stage chambers with hardening mixtures, characterized in that in order to reduce production costs by reducing the volume of preparatory-rifled workings and the volume of backfill mixture in the development of ore deposits with a complex roof in conditions of unstable and flooded roofs and soil, the artificial roof is formed by working off the false roof with short paired lavas and laying the resulting developed space hardening a mixture with high strength and waterproof properties, when forming an artificial roof, they form borer-blocking drifts in the backfill array at a distance equal to two spans of the cleaning chambers, the first-stage chambers work coaxially with the blunt-damper drifts in the direction from the center to the flanks of the excavation section, and queues - from the flanks to the center of the excavation 51TG78236 at the same time, prior to laying the worked-out soil, an impermeable layer of the space of chambers of the second stage, formed from rocks of a false roof, forms on the soil. CM . j: x e